The Mailchimp API syncs campaign stats and subscribers information between MailChimp and a database. It helps to download a list of unsubscribes to clean inhouse lists, build client portals, and pull...

From their site: The Yahoo! Search Marketing API provides programmatic access to the same functionality exposed visually in the web-based interface. You can create and manage campaigns, pull reports...

Baidu Search Marketing Service API provides a suite of web services that allow developers to interact with Baidu servers directly by API. Based on API, developers can build their own applications to...